Model-based hybrid dynamic event-triggered control for systems subject to DoS attacks: A hybrid system approach

This article addresses the event-triggered control problem for networked control systems with uncertainties and denial-of-service (DoS) attacks. A resilient model-based hybrid dynamic event-triggered mechanism (HDETM) is proposed to defend against DoS attacks and reduce communication in sensor-controller-actuator networks. Owing to the introduction of regularization variables, Zeno behavior is naturally excluded, even if there exist disturbances. By using model-based computing, the novel HDETM outperforms the existing event-triggered mechanisms in terms of network utilization and robustness. To model and analyze the proposed HDETM, we propose a novel framework based on hybrid systems, which is different from the traditional discrete-time system framework. Meanwhile, the exponential stability and the L2-gain performance of the closed-loop system are guaranteed by utilizing the stability theorems for hybrid systems. In addition to the centralized model-based HDETM, a decentralized HDETM is also provided for largescale systems which are composed of multiple interconnected subsystems. Finally, two examples are given that verify the improvement of the proposed model-based HDETM. (c) 2022 Elsevier Inc. All rights reserved.